The Action 2 front glass has a small, round silver sticker which sort of floats in front of the lens.  Does anyone know what that's for?

It is the color temperature photo sensor.

(https://dl.djicdn.com/downloads/ ... _Manual_V1.0_EN.pdf - Page 5)

If you have one with a silver disk, they only made three of them, and you can exchange them for a Ronin 4D for no extra payment.  (I hope it is still April Fools Day where you are!)

Its purpose is to create a UFO-like shadow in any shot with Sky in it.  Really.

fansfe82067d Posted at 4-1 05:36
If you have one with a silver disk, they only made three of them, and you can exchange them for a Ronin 4D for no extra payment.  (I hope it is still April Fools Day where you are!)

  

Blériot53 Posted at 4-1 08:03
Its purpose is to create a UFO-like shadow in any shot with Sky in it.  Really.

Must be on the deluxe model only.  

DowntownRDB Posted at 4-1 11:48
Must be on the deluxe model only.

Happy  1.4
Or 4.1 as you (incorrectly) call it

Hello there. Good day and thank you for the inquiry. As posted above by WICreekPaddler on post #2, the circular disc in front of the lens of the DJI Action 2 is called the Color Temperature Photo Sensor. Thank you.

Blériot53 Posted at 4-1 11:58
Happy  1.4
Or 4.1 as you (incorrectly) call it

Wrong.  I'm retired Navy so to me it is 1.4  and I still do military time.  

DowntownRDB Posted at 4-2 05:19
Wrong.  I'm retired Navy so to me it is 1.4  and I still do military time.

Ah. We're on the same wavelength there, then

Blériot53 Posted at 4-2 06:21
Ah. We're on the same wavelength there, then

Exactly.